Some problems in using upnp feature on my iphone

In IPhone, download the music to the app's space is an hard work. so normally, foobar is my controller to the home environment with upnp .

I see the upnp media server feature, thus mobile f2k can play the upnp media service music on iphone. However I don't find media renderer as fb2k in pc desktop version, thus i can't use mobile f2k to control my media player with upnp protocol.

is this any mistake on the trial process? or it doesn't support that feature in current version? or it will be developed in future version?